print("# 设定多个变量等于某一数值时")
x = y = z = 10
print(x)
print(y)
print(z)

print("#设定多个变量，每个变量有不同的值")
x , y , z = 10, 20, 30
print(x)
print(y)
print(z)

print("#将两个变量内容交换")
x, y = 10, 20
print(x,y)
x,y = y, x
print(x,y)